US6671108B2 - Optical apparatus including lens - Google Patents
Optical apparatus including lens Download PDFInfo
- Publication number
- US6671108B2 US6671108B2 US10/145,237 US14523702A US6671108B2 US 6671108 B2 US6671108 B2 US 6671108B2 US 14523702 A US14523702 A US 14523702A US 6671108 B2 US6671108 B2 US 6671108B2
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- United States
- Prior art keywords
- frame
- lens
- side abutment
- abutment surface
- adjustment
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- Expired - Lifetime
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
Definitions
- the present invention relates to optical apparatuses including lenses, such as a camera and observation apparatus.
- a plurality of lens groups constituting an optical system are contained/disposed in a lens holding frame, the lens holding frame is positioned and assembled in a frame member, and the frame member is mounted in a lens barrel of the optical apparatus such as a camera.
- the plurality of lens groups are required to be accurately positioned relative to each other.
- various lens adjustment techniques for accurately adjusting the positions of the plurality of lens groups have been proposed.
- Examples of the techniques include a method of disposing a predetermined gap between the lens holding frame which holds a lens and the frame member into which the lens holding frame is assembled, using this gap to adjust the position of the lens holding frame in a plane at right angles to an optical axis, and positioning and bonding or otherwise fixing the lens holding frame onto the frame member after the adjustment.
- Jpn. Pat. Appln. KOKAI Publication No. 11-271587 a technique of disposing two eccentric pins, rotating/operating these eccentric pins, and adjusting positions in two directions substantially at right angles to each other is proposed.
- the positions can be adjusted with a simple constitution, but there are many degrees of freedom in the adjustment direction of the lens holding frame, and operation properties are not satisfactory.
- some kind of adjustment device is required to perform an accurate adjustment.
- the frame is fixed to the frame member by measures such as an adhesive. Therefore, there is a problem that the optical axis suffers a positional deviation during the bonding operation.
- An object of the present invention is to provide an optical apparatus in which high-precision lens position adjustment can conveniently and easily be realized with a simple constitution.
- an optical apparatus comprising a lens holding frame which holds a lens; and a frame member to support the lens holding frame so that the lens holding frame can move along a plane substantially vertical to the optical axis of the lens, wherein a gap is formed between the outer periphery of the lens holding frame and the inner periphery of the frame member, and an adjustment member is inserted in the gap, so that the position of the lens holding frame relative to the frame member in the plane is set.
- the adjustment member when the position of the lens holding frame is adjusted with respect to the frame member, the adjustment member is inserted in the gap between the frame and the member, and the frame and member are moved/adjusted in the plane substantially vertical to the optical axis of the lens by an amount corresponding to the size of the adjustment member.
- the relative positions are thereby determined by the adjustment member in an adjustment position. Therefore, a simple construction is obtained. Additionally, high-precision positional adjustment of the lens optical axis is realized with the simple operation of selecting the size of the adjustment member and inserting the member in the gap.
- FIG. 1 is an exploded perspective view showing a main constitution of an optical apparatus according to one embodiment of the present invention.
- FIG. 2 is a perspective view showing a schematic constitution of a camera to which the constitution of FIG. 1 is applied.
- FIG. 3 is a plan view showing the assembled state of FIG. 1 from an optical axis direction.
- FIG. 4 is a sectional view of a section of FIG. 3 in the Y-axis direction.
- FIG. 5 is a sectional view showing one state of Y-axis direction adjustment of FIG. 4 .
- FIG. 6 is an exploded perspective view showing the main constitution of an optical apparatus according to another embodiment of the present invention.
- FIG. 7 is a plan view showing the assembled state of FIG. 6 from the optical axis direction.
- FIG. 1 shows an optical apparatus according to one embodiment of the present invention.
- a frame member 10 is mounted/disposed in a lens barrel 8 of a camera main body 9 , for example, as shown in FIG. 2.
- a lens holding frame 11 is mounted onto the frame member 10 .
- the optical axis direction is shown as the Z-axis
- a first direction crossing at right angles to the optical axis is shown as the X-axis
- a second direction crossing at right angles to the optical axis and first direction is shown as the Y-axis.
- reference numeral 7 denotes a release button
- 6 denotes a zoom switch
- 5 denotes a finder window
- 4 denotes ranging windows
- 3 denotes a strobe window
- 2 denotes a display portion.
- a flange-shaped frame portion 112 positioned in a plane substantially vertical to the optical axis is formed on one side of an attachment ring 111 , and first and second lenses 12 , 13 are contained/disposed at a predetermined interval in the frame portion.
- An index convex portion for positioning 113 is disposed in a predetermined position of the outer wall of the attachment ring 111 .
- the frame portion 112 has a pair of lens-side X abutment surfaces 114 and 115 and a pair of lens-side Y abutment surfaces 116 and 117 , all on the outer circumferential surface.
- the abutment surfaces 114 , 115 , 116 and 117 are flat surfaces that serve to position the lens holding frame 11 .
- the X abutment surfaces 114 and 115 extend substantially parallel to each other and extend and diametrically oppose each other across the optical axis of the optical apparatus.
- the Y abutment surfaces 116 and 117 extend substantially parallel to each other and oppose each other across the optical axis of the optical apparatus.
- an annular female screw portion 101 is projected from the tip end of the frame member 10 , and a shoulder 102 forming a plane substantially vertical to the optical axis is formed corresponding to the frame portion 112 of the lens holding frame 11 inside the female screw portion 101 .
- an insertion port for assembly 103 is formed corresponding to the attachment ring 111 of the lens holding frame 11 .
- the insertion port 103 of the frame member 10 is formed to be larger than the outer shape of the attachment ring 111 of the lens holding frame 11 by a predetermined amount, so that the lens holding frame 11 can be adjusted with respect to the frame member 10 in the plane substantially vertical to the optical axis.
- an index groove 100 for positioning is disposed in a predetermined position of the peripheral portion of the port for the index convex portion 113 of the lens holding frame 11 .
- a gap is disposed so as to enable position adjustment of the lens holding frame 11 and frame member 10 , while the index convex portion 113 of the lens holding frame 11 is inserted in the index groove 100 of the frame member 10 .
- the frame member 10 has a pair of frame-side X axis abutment surfaces 104 and 105 and a pair of frame-side Y axis abutment surfaces 106 and 107 , all on the inner circumferential surface.
- the abutment surfaces 104 , 105 , 106 and 107 are flat surfaces that serve to position the frame member 10 .
- the X abutment surfaces 104 and 105 extend substantially parallel to each other and extend and are diametrically opposite to each other across the optical axis.
- the X abutment surfaces 104 and 105 oppose the X abutment surfaces 114 and 115 of the frame portion 112 , respectively.
- the Y abutment surfaces 106 and 107 extend substantially parallel to each other and are diametrically opposite each other across the optical axis of the optical axis.
- the Y abutment surfaces 106 and 107 oppose the Y abutment surfaces 116 and 117 of the frame portion 112 , respectively.
- the lens holding frame 11 is inserted in such a manner that the index convex portion 113 of the attachment ring 111 is disposed opposite to the index groove 100 of the insertion port 103 of the frame member 10 .
- the attachment ring 111 is inserted in the insertion port 103 of the frame member 10 , and the frame and member are assembled in such a manner that the lens-side X abutment portions 114 , 115 and lens-side Y abutment portions 116 , 117 of the frame portion 112 are disposed opposite to the frame-side X abutment portions 104 , 105 and frame-side Y abutment portions 106 , 107 of the shoulder 102 of the frame member 10 .
- respective pairs of gaps for position adjustment are formed at predetermined intervals in the X-axis and Y-axis directions via the optical axis by the lens-side X abutment portions 114 , 115 and lens-side Y abutment portions 116 , 117 of the frame portion 112 and the frame-side X abutment portions 104 , 105 and frame-side Y abutment portions 106 , 107 of the shoulder 102 of the frame member 10 .
- Adjustment members 141 to 144 having shapes/sizes in accordance with the gap adjustment amount and having, for example, rectangular parallelepiped shapes are selected and inserted in the gaps formed in these X-axis and Y-axis directions via the optical axis.
- the lens holding frame 11 is moved with respect to the frame member 10 independently in the X-axis and Y-axis directions in accordance with the shapes/sizes of the adjustment members 141 to 144 inserted in the gaps.
- the optical axis of the first and second lenses 12 , 13 is quantitatively adjusted in the plane in the X-axis and Y-axis directions.
- a plurality of various types of shapes/sizes of the adjustment members 141 to 144 are prepared in such a manner that the position of the actual optical axis O 2 of the X-axis and Y-axis directions of the optical axis of the first and second lenses 12 , 13 of the lens holding frame 11 can be modified to the position of a virtual optical axis O described later.
- the shapes/sizes are selected in accordance with the displacement amount of the optical axis and the adjustment members are inserted in the gaps (see FIG. 4 ).
- a press member 15 is attached to the female screw portion 101 .
- the press member 15 is formed substantially in an annular shape, a screw portion 151 is formed in the outer peripheral portion of the member, and a shield portion 152 is formed in the inner peripheral portion of the member.
- the shield portion is disposed opposite to the adjustment members 141 to 144 and the frame portion 112 of the lens holding frame 11 and regulates movement of the optical axis direction.
- an opening 153 for exposing the first and second lenses 12 , 13 is formed substantially in the middle portion of the press member 15 .
- the screw portion 151 of the press member 15 is set into screw engagement in the female screw portion 101 of the frame member 10 .
- the press member 15 is thereby fastened to the front of the lens holding frame 11 .
- the shield portion 152 of the press member 15 oppose the adjusting members 141 to 144 and the frame portion 112 of the lens holding frame 11 .
- the first lens 12 and the second lens 13 are exposed through the opening 153 of the press member 15 .
- the press member 15 and the adjusting members 114 to 144 cooperate to move the lens holding frame 11 along the optical axis and in a plane substantially perpendicular to the optical axis, whereby the press member 15 adjusts the optical axis of the optical apparatus.
- the press member 15 covers the lens holding frame 11 , making the optical apparatus look neat and tidy.
- the lens holding frame 11 is inserted in the frame member 10 in such a manner that the index convex portion 113 of the attachment ring 111 is disposed opposite to the index groove 100 of the insertion port 103 of the frame member, and the attachment ring 111 is inserted in the insertion port 103 of the frame member 10 with an adjustment gap.
- the lens holding frame 11 is assembled in such a manner that the lens-side X abutment portions 114 , 115 and lens-side Y abutment portions 116 , 117 of the frame portion 112 are disposed opposite to the frame-side X abutment portions 104 , 105 and frame-side Y abutment portions 106 , 107 of the shoulder 102 of the frame member 10 .
- adjustment members 141 to 144 are inserted in the respective pairs of gaps formed in the X-axis and Y-axis directions via the optical axis by the lens-side X abutment portions 114 , 115 and lens-side Y abutment portions 116 , 117 of the frame portion 112 , and the frame-side X abutment portions 104 , 105 and frame-side Y abutment portions 106 , 107 of the shoulder 102 of the frame member 10 (see FIG. 4 ).
- the optical axes O and O 1 agree with each other.
- the actual optical axis O 2 is sometimes in a position deviating from the virtual optical axis O because of a manufacturing error or a component assembly error.
- the inserted state of the adjustment members 141 to 144 is considered as an initial state, and the actual optical axis O 2 is measured by a measuring instrument (not shown).
- a measuring instrument not shown
- the shapes/sizes of the adjustment members 143 , 144 are selected so as to allow the actual optical axis O 2 to agree with the virtual optical axis O.
- the adjustment members are inserted in the gaps formed by the lens-side Y abutment portions 116 , 117 and frame-side Y abutment portions 106 , 107 .
- the Y-axis direction of the optical axis O 2 is displaced by a predetermined amount, the axis is allowed to agree with the virtual optical axis O, and the optical axis of the Y-axis direction is adjusted.
- the adjustment members 141 , 142 are similarly selected so that the actual optical axis O 2 agrees with the virtual optical axis O, and they are inserted in the gaps formed by the lens-side X abutment portions 114 , 115 and frame-side X abutment portions 104 , 105 .
- the first and second lenses 12 , 13 of the lens holding frame 11 are displaced in the X-axis direction of the actual optical axis O 2 by a predetermined amount so that the optical axis agrees with the virtual optical axis O.
- the X-axis and Y-axis directions of the actual optical axis O 2 are aligned with those of the virtual optical axis O, and the optical axis adjustment is completed.
- the adjustment members 141 to 144 are replaced. Therefore, the above-described index convex portion 113 and index groove 100 are disposed in order to prevent the rotary positions of the lens holding frame 11 and frame member 10 around the optical axis from changing. Moreover, when the positional deviation of the actual optical axis O 2 and virtual optical axis O is within a range having no problem in actual use in the initial state, it is unnecessary to change the adjustment members 141 to 144 . In this case, only components having large manufacturing and assembly errors (components having large dispersions) are adjusted, the adjustment of components having relatively small errors (components having small dispersions) can be omitted, and the number of operation steps can be reduced.
- the shapes/sizes of the adjustment members 141 to 144 to be inserted are selected based on the actual optical axis O 2 .
- the adjustment members having different shapes/sizes are inserted in the pairs of gaps disposed opposite to each other and formed by the lens-side X abutment portions 114 , 115 and lens-side Y abutment portions 116 , 117 of the frame portion 112 of the lens holding frame 11 , and the frame-side X abutment portions 104 , 105 and frame-side Y abutment portions 106 , 107 of the shoulder 102 of the frame member 10 .
- the members are inserted in the gaps of one direction where necessary, and the desired optical axis position is set.
- the screw portion 151 of the press member 15 is attached to the female screw portion 101 of the frame member 10 , and assembled on the front surface side of the lens holding frame 11 .
- the shield portion 152 of the press member 15 is disposed opposite to the adjustment members 141 to 144 and the frame portion 112 of the lens holding frame 11 , and the positions of the optical axis direction of these members are regulated.
- the first and second lenses 12 , 13 of the lens holding frame 11 are exposed via the opening 153 .
- the position of the lens holding frame 11 in the plane substantially vertical to the optical axis and in the optical axis direction is regulated, for example, by the press member 15 and adjustment members 141 to 144 . Additionally, in the state in which adjustment of the optical axis is complete, the optical axis adjustment structure is covered and the appearance is not spoiled
- the optical axis adjustment structure is covered and the appearance is not spoiled.
- the optical apparatus is constituted such that the lens holding frame 11 is assembled with the frame member 10 so as to be movable along the plane substantially vertical to the optical axis of the first and second lenses 12 , 13 , pairs of gaps are formed between the outer periphery of the lens holding frame 11 and the inner periphery of the frame member 10 in the X-axis and Y-axis directions via the optical axis, adjustment members 141 to 144 are selectively inserted in the gaps, and the position of the lens holding frame 11 with respect to the frame member 10 in the plane substantially vertical to the optical axis is set.
- the adjustment members 141 to 144 are inserted in the gaps formed between the frame and the member. Then, the lens holding frame is moved/adjusted in the plane substantially vertical to the optical axis of the lens by the amount corresponding to the sizes of the adjustment members 141 to 144 . In the state in which the lens holding frame and frame member are positioned with respect to each other by the adjustment members 141 to 144 in the adjusted position, the optical axis adjustment is completed. As a result, the optical axis adjustment structure is simplified and a simple device constitution is obtained. Additionally, high-precision position adjustment of the lens optical axis is realized by the simple operation of selecting the sizes of the adjustment members 141 to 144 and inserting the members in the gaps.
- the device constitution even when a lens holding frame 11 having the position thereof adjusted is fixed onto the frame member 10 , the mutual positions of the frame and member are regulated in the plane substantially vertical to the optical axis via the adjustment members 141 to 144 . Thereby, high-precision positioning/fixing is easily enabled.
- the position of the lens holding frame 11 as the characteristic of the present invention is adjusted in the plane substantially vertical to the optical axis via the adjustment members 141 to 144 .
- the frame member 10 assembled with the lens holding frame is first assembled/disposed, for example, with the lens group of another frame member constituting the optical system. In the assembled state, the degree of eccentricity from the lens optical axis of another frame member is measured.
- the adjustment members 141 to 144 are replaced and the position of the X-axis and Y-axis directions is adjusted in accordance with the measured eccentricity, the eccentricity of the optical system can be adjusted.
- the step of measuring the eccentricity of the lens can be performed separately from the eccentricity adjusting step, and the assembly operation is conveniently and easily realized.
- the present invention is not limited to the above-described embodiment, and may further be constituted as shown in FIGS. 6 and 7. Additionally, in FIGS. 6 and 7, the same components as those of FIGS. 1 and 3 are denoted with the same reference numerals and the descriptions thereof are omitted.
- first and second adjustment portions 21 , 22 having substantially rectangular parallelepiped shapes are connected via an annular coupling portion 23 having flexibility to the lens-side X abutment portions 114 , 115 or the lens-side Y abutment portions 116 , 117 (the frame-side X abutment portions 104 , 105 or the frame-side Y abutment portions 106 , 107 ) at predetermined intervals.
- Such an adjustment member 20 is used in this device constitution.
- the first and second adjustment portions 21 , 22 of the adjustment member 20 are formed in substantially rectangular parallelepiped shapes corresponding to the gaps formed by the lens-side X abutment portions 114 , 115 or the lens-side Y abutment portions 116 , 117 (the frame-side X abutment portions 104 , 105 or the frame-side Y abutment portions 106 , 107 ).
- the first and second adjustment portions 21 , 22 are connected to each other via the coupling portion 23 so as to be elastically deformable so that the one surface of each adjustment portion in the optical axis direction is aligned with the surface of the coupling portion.
- the other surface of each adjustment portion in the optical axis direction projects from the coupling portion 23 in the optical axis direction.
- the coupling portions 23 for connecting the first and second adjustment portions 21 , 22 are formed so that the members can be contained in the gaps formed by the lens holding frame 11 and frame member 10 including the gaps formed by the lens-side X abutment portions 114 , 115 and lens-side Y abutment portions 116 , 117 and the frame-side X abutment portions 104 , 105 and frame-side Y abutment portions 106 , 107 .
- the adjustment members 20 a plurality of types of shapes/sizes of the adjustment members in the direction substantially vertical to the optical axis of the first and second adjustment portions 21 , 22 are prepared so that the displacement amounts of the X-axis and Y-axis directions of the actual optical axis O 2 of the first and second lenses 12 , 13 of the lens holding frame 11 agree with those of the virtual optical axis O.
- the adjustment members are selected in accordance with the displacement amount of the optical axis and inserted in the gaps.
- each set of the first and second adjustment portions 21 , 22 of the adjustment member 20 is inserted in a pair of first and second gaps of the X-axis direction formed by the lens-side X abutment portions 114 , 115 of the frame portion 112 of the lens holding frame 11 and the frame-side X abutment portions 104 , 105 of the shoulder 102 of the frame member 10 .
- each coupling portion 23 is elastically deformed, the position errors of the first and second adjustment portions 21 , 22 are absorbed.
- the position of the lens holding frame 11 relative to the frame member 10 is determined by the thicknesses and gaps in the diametric direction of the first and second adjustment portions 21 , 22 .
- two adjustment members 20 are inserted in the gaps of the X-axis and Y-axis directions so that the projecting surfaces of the first and second adjustment portions 21 , 22 are disposed opposite to those of the other adjustment member. Thereby, the two adjustment members 20 do not interfere with each other, and a space can effectively be used.
- the adjustment members can be assembled/disposed in the vicinity of each other between the lens holding frame 11 and the frame member 10 , and miniaturization is realized in the optical axis direction.
- the lens holding frame 11 is assembled onto the frame member 10 via the adjustment members 141 to 144 ( 20 ).
- the press member 15 is attached/assembled and the position of the optical axis direction is regulated in the constitution.
- the present invention is not limited to this constitution, and can also be constituted such that the press member 15 is attached to the frame member 10 by other methods.
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Abstract
Description
Claims (20)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2001-143425 | 2001-05-14 | ||
JP2001143425A JP2002341220A (en) | 2001-05-14 | 2001-05-14 | Optical instrument |
Publications (2)
Publication Number | Publication Date |
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US20020167741A1 US20020167741A1 (en) | 2002-11-14 |
US6671108B2 true US6671108B2 (en) | 2003-12-30 |
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Application Number | Title | Priority Date | Filing Date |
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US10/145,237 Expired - Lifetime US6671108B2 (en) | 2001-05-14 | 2002-05-13 | Optical apparatus including lens |
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US (1) | US6671108B2 (en) |
JP (1) | JP2002341220A (en) |
CN (1) | CN1385725B (en) |
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Cited By (12)
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US20080247431A1 (en) * | 2005-09-07 | 2008-10-09 | Ellex Medical Pty Ltd | Optical Mount for Laser Rod |
US7643230B2 (en) * | 2005-09-07 | 2010-01-05 | Ellex Medical Pty Ltd | Optical mount for laser rod |
AU2006289656B2 (en) * | 2005-09-07 | 2011-01-06 | Ellex Medical Pty Ltd | Optical mount for laser rod |
US20090316117A1 (en) * | 2008-06-18 | 2009-12-24 | Coretronic Corporation | Lens adjusting device of projector |
US8366280B2 (en) * | 2008-06-18 | 2013-02-05 | Coretronic Corporation | Lens adjusting device of projector |
US20160018088A1 (en) * | 2013-03-28 | 2016-01-21 | Wac Lighting (Dongguan) Co., Ltd. | Connecting device for light fixtures |
US9416947B2 (en) * | 2013-03-28 | 2016-08-16 | Wac Lighting (Dongguan) Co., Ltd. | Connecting device for light fixtures |
USD722100S1 (en) * | 2013-07-24 | 2015-02-03 | Sony Corporation | Adapter |
US20150168669A1 (en) * | 2013-12-17 | 2015-06-18 | Canon Kabushiki Kaisha | Optical apparatus |
US9400369B2 (en) * | 2013-12-17 | 2016-07-26 | Canon Kabushiki Kaisha | Optical apparatus |
USD745592S1 (en) * | 2014-09-10 | 2015-12-15 | Samsung Electronics Co., Ltd. | Lens for camera |
WO2019150188A1 (en) * | 2018-02-05 | 2019-08-08 | Corephotonics Ltd. | Reduced height penalty for folded camera |
Also Published As
Publication number | Publication date |
---|---|
US20020167741A1 (en) | 2002-11-14 |
CN1385725B (en) | 2011-01-05 |
JP2002341220A (en) | 2002-11-27 |
CN1385725A (en) | 2002-12-18 |
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